Cita APA (7a ed.)

Commission of the European Communities. Directorate-General for Energy. (1999). Energy in Europe: European Union energy outlook to 2020. Office for Official Publications of the European Communities.

Cita Chicago Style (17a ed.)

Commission of the European Communities. Directorate-General for Energy. Energy in Europe: European Union Energy Outlook to 2020. Luxembourg: Office for Official Publications of the European Communities, 1999.

Cita MLA (9a ed.)

Commission of the European Communities. Directorate-General for Energy. Energy in Europe: European Union Energy Outlook to 2020. Office for Official Publications of the European Communities, 1999.